Locating a specific address within Castle Rock, Colorado, requires a numerical designation known as a postal code. This code allows for efficient mail sorting and delivery. For example, correspondence addressed to a business on Wilcox Street would include a five-digit code ensuring its arrival at the correct location. Additional four-digit extensions further refine delivery within larger areas, enhancing precision.
These numerical codes are essential for a variety of purposes beyond mail delivery. Businesses utilize them for market analysis, demographics studies, and targeted advertising. Government agencies rely on them for census data collection, resource allocation, and emergency services dispatch. Accurate postal data is vital for efficient commerce, effective governance, and community planning. The system has evolved over time, adapting to population growth and technological advancements, ensuring continued reliability in an increasingly interconnected world.